Casio G-Shock GS1100 SeriesThe Casio G-Shock GS1100 series has the multi-band atomic timekeeping mechanism for USA, UK, Germany, and Japan. It basically has time calibration through radio signals that keep the time accurate. It is done through automatic receiving function for at 6 times a day.
It has solar power capability to keep its watch functioning through various light sources including florescent lights. The batteries are fully rechargeable. Naturally this watch maintains the G-Shock famous tough shock resistance through many layers of protection to maintain the integrity of the watch core from intense shock experiences. It has a 200 meters water resistance It has the ability to present World Time based on 29 time zones representing 27 cities with city code display and daylight saving on/off. The Casio G-Shock GS1100 Return to Mens Watches Guide
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series also has the 1/20 second chronograph with measuring capacity 59'59.95" and providing elapsed time. Its auto-calendar is pre-programmed until the year 2099. Its accuracy of time reading is +/- 20 seconds per month without signal calibration.